[SOLVED] Sizing columns in DrawGrid

[VTwin]

I recently noticed that TDrawGrid using goColSizing works fine on Macintosh and Linux, but does not work on Windows.

An example is attached. Any comments appreciated.

[wp]

Working fine for me: Win-11 Laz-main / FPC 3.2.2 / 64-bit or 32-bit.

[VTwin]

Thanks wp. That is good to know.

It may be my ancient version of Windows (7). It is all I have at the moment to run on VirtualBox.   

[wp]

This cannot be the reason for your issue. I have Win-7 in a VirtualBox, too, and your demo behaves correctly.

[VTwin]

Thanks again wp for checking. This is odd. In general Lazarus and its compiled applications work fine on Windows 7. This is the first time I noticed something unusual.

I am working on installing Windows 11 and Lazarus on VirtualBox, but it is slow going.

[VTwin]

In case I was not clear, are you able to resize the column widths using the mouse?

[wp]

In case I was not clear, are you able to resize the column widths using the mouse?

Yes

[VTwin]

Weird. I now have Lazarus 2.2.4 running on Windows 11 in VBox (but not so stable yet).

If I create a new Application in either 7 or 11, add a TStringGrid and a TDrawGrid, and check goColSizing for each, I can not resize the columns.

It works fine on Mac and Linux. 

[VisualLab]

I also checked on my computer. Changing the column widths with the mouse works fine. Tested on Windows 10 64-bit, Lazarus 2.2.0 FPC 3.2.2 x86_64.

[jamie]

did you reverse the mouse LEFT/RIGHT button operations in your setup ?

[VTwin]

Many thanks all. Presumably I have something amiss in my VBox (or Windows?) settings.

I will try to solve it this evening.

[VTwin]

It is still a mystery. Mouse drag works fine in the Lazarus form editor. Scrollbars work.

I tried swapping mouse keys, but that just switches when I have to press the "control"/"command" button.

I am encouraged that no one reports problems in Windows, so my compiled applications should be fine for end users.

Is anyone else using a Macintosh VirtualBox host running Windows?

Thanks

[VTwin]

It has to do with VBox "Mouse Integration". I realized that every once in a while I could click on just the right place. Turning off mouse integration allows one to easily click on the column border.

I think it is due to the way VBox converts from mouse location in percent to pixels, there is some discussion here:

https://www.virtualbox.org/wiki/MouseInput

Thanks